A note from Keith — Yesterday I resigned from Square, and I want to take the opportunity to explain to you why. — The past few days have been the toughest, saddest, most frightening, and emotionally draining of my life. They have deeply affected me, both personally and professionally.

Yahoo's Mayer Sees Future in Personalized, Mobile Web — Yahoo's Mayer: Personalization Is Future of Search — Yahoo! Inc. (YHOO) Chief Executive Officer Marissa Mayer said the company is working on technology that will personalize content from the Web and feed it to people on their mobile devices.

Apple Adds ‘App Store Notes’ to Featured Apps — Apple has quietly added a new notes feature to its curated apps in the iOS App Store. Apps chosen for Editor's Choice and App of the Week now come with App Store Notes, which offer a quick description of the app.